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The Cisco GainMaker® GaN High Gain Dual (HGD) System Amplifier is the latest-generation broadband amplifier in the Cisco GainMaker platform. Gallium nitride (GaN) technology supports RF output levels up to 58 dBmV. The Cisco GaN HGD amplifier (Figure 1) provides two high-level forward RF outputs (main and auxiliary), with the option to create a third RF output by using an optional plug-in auxiliary path signal director. All Cisco GainMaker products share common plug-in accessories and perform to 1 GHz in the forward path. The system amplifiers in this portfolio provide multiple forward RF output ports, while the line extenders provide a single forward RF output port.

Cisco GainMaker 1 GHz system amplifier modules have increased gain to allow drop in for 750-MHz spacing and are mechanically compatible with previous Cisco GainMaker System Amplifier II, II+, and III housing bases, often allowing upgrade to higher bandwidth with no respacing or resplicing. The DC power supply is modular and located in an updated housing lid for easy access. All Cisco GainMaker 1 GHz system amplifier modules are factory configured with reverse amplifier, diplex filters, thermal compensation circuit, forward interstage pads, and equalizer to promote optimal performance. Optional single-pilot automatic gain control (AGC) configurations are also available.

Figure 1. Cisco GainMaker GaN HGD System Amplifier

Features

●High-performance GaN gain stage technology

●Plug-in accessories that are common to all Cisco GainMaker nodes and Cisco GS7000 products (i.e.,attenuator pads, equalizers, diplexers, and crowbar)

Unless otherwise noted, specifications reflect typical performance and are referenced to 68°F (20°C). Specifications are based upon measurements made in accordance with SCTE/ANSI standards (where applicable), using standard frequency assignments.

Table 4.Station Delay Characteristics

Station Delay Characteristics

Forward (Chrominance to Luminance Delay)

Reverse (Group Delay in 1.5 MHz bandwidth)

Frequency (MHz)

Delay (ns)

Frequency (MHz)

Delay (ns)

55.25 to 58.83

37

5.0 to 6.5

60

61.25 to 64.83

14

6.5 to 8.0

22

67.25 to 70.83

8

8.0 to 9.5

12

77.25 to 80.83

4

37.5 to 39.0

16

39.0 to 40.5

22

40.5 to 42.0

35

Table 5.Station Powering Data

Station Powering Data

Cisco GainMaker

GaN HGD System Amplifier

I DC(Amps)

AC Voltage

90

42

80

75

70

65

60

55

50

45

40

35

Thermal

1.51

AC current (A)

0.69

0.69

0.66

0.67

0.66

0.68

0.77

0.83

0.89

0.99

1.11

1.31

Power (W)

41.2

41.1

41.0

40.8

40.7

40.7

40.6

40.6

40.6

40.5

40.6

40.8

AGC

1.56

AC current (A)

0.70

0.70

0.68

0.69

0.68

0.70

0.79

0.85

0.92

1.02

1.16

1.35

Power (W)

42.5

42.4

42.3

42.2

42.0

42.0

41.9

41.9

41.9

41.9

42.0

42.2

AGC with status monitor and reverse switch

1.70

AC current (A)

0.73

0.73

0.72

0.73

0.73

0.77

0.86

0.92

1.01

1.12

1.27

1.46

Power (W)

46.2

46.1

46.0

45.9

45.8

45.7

45.6

45.6

45.6

45.6

45.8

46.0

Data is based on stations configured for two-way operation. AC currents specified are based on measurements made with typical CATV type ferroresonant AC power supply (quasi-square wave), and Cisco GainMaker High Output System Amplifier power supply (2.5A, 24 VDC, pn 4022846).

DC supply has a user configurable 30V, 40V, or 50 VAC under voltage lockout circuit. Default setting is 30V, 40V, or 50 VAC. Under-voltage lockout may be selected by changing the position of the lockout jumper.

Unless otherwise noted, specifications reflect typical performance and are referenced to 68°F (20°C). Specifications are based upon measurements made in accordance with SCTE/ANSI standards (where applicable), using standard frequency assignments.

Table 6.Physical Specifications

Environmental

Operating temperature range

-40 - 140°F (-40 - 60°C)

Mechanical

Housing dimensions (L x H x D)

17.3 in. x 7.2 in. x 7.8 in. (439.4 mm x 182.9 mm x 198.1 mm)

Weight

●Housing with power supply

●Module

12 lb, 5 oz (5.6 kg)

5 lb, 5 oz (2.4 kg)

Ordering Information

The Cisco GainMaker GaN HGD System Amplifier is available in a wide variety of configurations. The desired configuration is “built” by accessing the Cisco Commerce Workspace tool at https://cisco-apps.cisco.com/cisco/psn/commerce. The user specifies the new Assemble to Order (ATO) Product ID for the GainMaker System Amplifier High Gain Dual System Amplifier “GMSA-HGD” and the tool steps through the available options. Services may also be selected during this process. Once all the desired options are selected, the configuration and price are displayed. When the “Done” radio button is clicked, the configuration can be exported and saved for future use or immediate ordering. Table 7 and Table 8 contain ordering information for required and optional accessories. Please consult with your Account Representative, Customer Service Representative, or System Engineer to determine the best configuration for your particular application.

Table 7.Required Accessories

Required Accessories

Part Number

Plug-in Pads (attenuators): Available in 0.5 dB steps from 0 to 20.5 dB

Seizure Upgrade Kit: 1 required if upgrading an existing SAII or SAII+ housing base to allow use of Cisco GainMaker System Amplifier Modules. Includes high current (15A) rated seizure screws and anvils.